Try one of these regular expressions:

http://www.regexlib.com/Search.aspx?k=datetime

>How to I validate a date?
>
>The user might enter '5/20', from which I create a string of '05/20/05'.
>
>I then convert it to date using:
>
>

>DateTime dDate = Convert.ToDateTime(sDate);
>

>
>But if the user enter2 '55/75', my string would then be '55/75/05' and
>the conversion to date errors.
>
>I want to validate it before I try to convert.
>
>I'm using C#.
>
>Thanks